共查询到20条相似文献，搜索用时 169 毫秒
1.
简谐激励下输流管的稳定性和混沌运动 总被引：3，自引：0，他引：3
Ｎｏｔａｔｉｏｎａｖｉｓｃｏｅｌａｓｔｉｃｃｏｅｆｆｉｃｉｅｎｔ Ａ ｃｒｏｓｓ ｓｅｃｔｉｏｎａｌａｒｅａｏｆｔｈｅｐｉｐｅｗａｌｌｄｄｉｍｅｎｓｉｏｎｌｅｓｓｆｏｒｃｉｎｇａｍｐｌｉｔｕｄｅＤｆｏｒｃｉｎｇａｍｐｌｉｔｕｄｅＥＩｆｌｅｘｕｒａｌｒｉｇｉｄｉｔｙｏｆｔｈｅｐｉｐｅｇ ａｃｃｅｌｅｒａｔｉｏｎｄｕｅｔｏｇｒａｖｉｔｙＬｌｅｎｇｔｈｏｆｐｉｐｅｍｓｐｅｃｉｆｉｃｍａｓｓｏｆｐｉｐｅＭｓｐｅｃｉｆｉｃｍａｓｓｏｆｆｌｕｉｄｎｄｉｍｅｎｓｉｏｎｌｅｓｓｆｏｒｃｉｎｇｆｒｅｑｕｅｎｃｙｔｔｉ… 相似文献
2.
CHEN Jian ming ZHANG Jian cheng SHEN Yue LIU Xiu hong YANG Lin hong School of Material Science Engineering Shanghai University Shanghai China 《上海大学学报(英文版)》2001,(2)
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｒｅｃｅｎｔｌｙｐｈｔｈａｌｏｃｙａｎｉｎｅｓ (Ｐｃｓ)ａｓｏｒｇａｎｉｃｓｅｍｉｃｏｎ ｄｕｃｔｏｒｓｈａｖｅａｔｔｒａｃｔｅｄｍｏｒｅａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｔｈｅｙａｒｅｖｅｒｙｓｔａｂｌｅ .Ｐｃｓ ｐｏｓｓｅｓｓｂｅｔｔｅｒ ｐｈｏｔｏｅｌｅｃｔｒｉｃａｌｐｒｏｐｅｒｔｉｅｓａｎｄｈｉｇｈｌｙａｂｓｏｒｐｔｉｏｎｉｎｔｈｅｖｉｓｉｂｌｅｌｉｇｈｔｒｅ ｇｉｏｎ .ＳｏｍｅｐｒｏｐｅｒｔｉｅｓｏｆＰｃｓｃａｎｂｅｉｍｐｒｏｖｅｄａｌｏｔｂｙｂｏｎｄｉｎｇｔｏｐ… 相似文献
3.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｉｍａｇｅｌｏｓｓｌｅｓｓｃｏｍｐｒｅｓｓｉｏｎｃｏｄｉｎｇｉｓａｎｉｍｐｏｒｔａｎｔｐａｒｔｏｆｔｈｅｄｉｇｉｔａｌｉｍａｇｅｃｏｍｐｒｅｓｓｉｏｎｒｅｓｅａｒｃｈ .Ｍｅｄｉｃａｌｉｍａｇｅｓ,ｓａｔｅｌｌｉｔｅｉｍａｇｅｓａｎｄｓｅｉｓｍｉｃｄａｔａｄｅｍａｎｄｌｏｓｓ ｌｅｓｓｃｏｄｉｎｇ .Ｔｈｅｂａｓｉｃｉｄｅａｏｆｃｏｍｐｒｅｓｓｉｏｎｉｓｔｏｅｘｐｌｏｉｔｔｈｅｃｏｒｒｅｌａｔｉｏｎｓｔｒｕｃｔｕｒｅｐｒｅｓｅｎｔｅｄｉｎｍｏｓｔｒｅａｌｌｉｆｅｉｍ … 相似文献
4.
LU Xiao bing YANG Zhen sheng 《上海大学学报(英文版)》1999,3(3):199-202
Ｎｏｍｅｎｃｌａｔｕｒｅρｗｄｅｎｓｉｔｙｏｆｗａｔｅｒρｓｄｅｎｓｉｔｙｏｆｓｏｉｌｖｗｘｖｅｌｏｃｉｔｙｏｆｗａｔｅｒｉｎｘｄｉｒｅｃｔｉｏｎｖｗｙｖｅｌｏｃｉｔｙｏｆｗａｔｅｒｉｎｙｄｉｒｅｃｔｉｏｎｖｓｘｖｅｌｏｃｉｔｙｏｆｓｏｉｌｉｎｘｄｉｒｅｃｔｉｏｎｖｓｙｖｅｌｏｃｉｔｙｏｆｓｏｉｌｉｎｘｄｉｒｅｃｔｉｏｎｐｐｏｒｅｐｒｅｓｓｕｒｅσｅｘｅｆｆｅｃｔｉｖｅｓｔｒｅｓｓｅｓｉｎｘｄｉｒｅｃｔｉｏｎσｅｙｅｆｆｅｃｔｉｖｅｓｔｒｅｓｓｅｓｉｎｙｄｉｒｅｃｔｉｏｎτｘｙ,τｓｈｅａｒｓｔ… 相似文献
5.
PENG Li ming MAO Xie min XU Kuang di 《上海大学学报(英文版)》1999,3(4):313-317
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｗｉｔｈｔｈｅｉｎｃｒｅａｓｅｏｆｒｅｑｕｉｒｅｍｅｎｔｓｆｏｒｍａｔｅｒｉａｌｐｒｏｐｅｒｔｉｅｓｉｎｉｎｄｕｓｔｒｙａｐｐｌｉｃａｔｉｏｎｓ,ｓｕｃｈｍａｔｅｒｉａｌｓｗｉｔｈａｎｉｓｏｔｒｏｐｉｃｍｉｃｒｏｓｔｒｕｃｔｕｒｅｓｇｅｔｅｘｐａｎｓｉｖｅａｐｐｌｉｃｏｔｉｏｎｉｎｉｎｄｕｓｔｒｙ［１,２］．Ｄｉｒｅｃｔｉｏｎａｌｓｏｌｉｄｉｆｉｃａｔｉｏｎｍｉｃｒｏｓｔｒｕｃｔｕｒｅｉｓｏｎｅｏｆｔｈｅｓｅｔｙｐｅｓｏｆｍａｔｅｒｉａｌｓ,ｗｈｉｃｈｉｎｃｌｕｄ… 相似文献
6.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｉｎｒｅｃｅｎｔｙｅａｒｓ ,ｃｏｎｔｒｏｌｌｉｎｇｃｈａｏｓｈａｓｄｒａｗｎｇｒｅａｔａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｏｆｉｔｓｔｈｅｏｒｅｔｉｃａｌｉｍｐｏｒｔａｎｃｅａｎｄｐｏｓｓｉ ｂｌｅａｐｐｌｉｃａｔｉｏｎｓ[1,2 ] .Ｔｈｅａｐｐｌｉｃａｔｉｏｎｓｏｆｎｏｎｌｉｎｅａｒｓｙｓ ｔｅｍｔｈｅｏｒｙｔｏｃｏｎｔｒｏｌｃｈａｏｓｉｓｏｎｅｏｆｔｈｅｍａｉｎａｓｐｅｃｔｓｏｆｒｅｓｅａｒｃｈｏｎｃｏｎｔｒｏｌｌｉｎｇｃｈａｏｓ[2 ] .Ｔｈｅｅｘａｃｔｌｉｎｅａｒｉｚａｔ… 相似文献
7.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｐｈａｓｅｉｓａｎｉｍｐｏｒｔａｎｔｃｏｎｃｅｐｔｉｏｎｉｎｏｐｔｉｃｓ.Ｉｔｓｄｅｆｉｎｉ ｔｉｏｎｉｓｅｘｐｌｉｃｉｔｉｎｃｌａｓｓｉｃｏｐｔｉｃｓ,ｂｕｔｉｔｉｓｄｉｆｆｉｃｕｌｔｔｏｇｉｖｅｉｔｓｄｅｆｉｎｉｔｅｍｅａｎｉｎｇｉｎｑｕａｎｔｕｍｏｐｔｉｃｓ.Ｔｈｅｒｅｈａｖｅｂｅｅｎｓｅｖｅｒａｌｄｅｆｉｎｉｔｉｏｎｓ,ｗｈｉｃｈｈａｖｅｄｉｆｆｅｒｅｎｔｃｈａｒａｃｔｅｒｉｓｔｉｃｒｅｓｐｅｃｔｉｖｅｌｙ.ＳｏｍｅｏｆｔｈｅｍａｒｅＳｕｓｓｋｉｎｄ Ｇｌｏｇｏｗｅ… 相似文献
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１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｉｔｉｓａｎｅａｓｙｔａｓｋｆｏｒｅｘｐｅｒｉｅｎｃｅｄｃｙｔｏｐａｔｈｏｌｏｇｉｓｔｓｔｏｉｄｅｎｔｉｆｙｃｅｌｌｓｕｎｄｅｒｏｐｔｉｃａｌｍｉｃｒｏｓｃｏｐｅｓ,ｂｕｔｉｔｉｓｖｅｒｙｃｏｍｐｌｉｃａｔｅｄｆｏｒｃｏｍｐｕｔｅｒｔｏｃａｒｒｙｏｎｔｈｅｓａｍｅｍｉｓｓｉｏｎａｕｔｏｍａｔｉｃａｌｌｙ．Ｏｎｅｏｆｔｈｅｍａｊｏｒｒｅａｓｏｎｓｉｓｔｈｅｖａｒｉｏｕｓｐａｒａｍｅｔｅｒｓａｎｄｆｅａｔｕｒｅｓｏｆｃｅｌｌｓｔｈａｔｏｆｔｅｎｏｖｅｒｌａｐｗｉｔｈｅ… 相似文献
9.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｓｔｒｅｓｓｉｎｔｅｎｓｉｔｙｆａｃｔｏｒ(ＳＩＦ)ｏｆｔｈｅｓｅｍｉｅｌｌｉｐｔｉｃａｌｓｕｒｆａｃｅｃｒａｃｋｎｅｅｄｓｔｏｂｅｃａｌｃｕｌａｔｅｄｆｏｒｅｖａｌｕａｔｉｎｇｔｈｅｓｔｒｅｎｇｔｈｏｆｍｅｔａｌｃｏｍｐｏｎｅｎｔｓｂｅｃａｕｓｅｍａｎｙｆｌａｗｓｏｃｃｕｒｏｎｔｈｅｃｏｍｐｏｎｅｎｔｓｕｒｆａｃｅｄｕｅｔｏｔｈｅｎａｎｕｆａｃｔｕｒｅａｎｄｔｒａｎｓｐｏｒｔｐｒｏｃｅｄｕｒｅ.Ｕｐｔｏｎｏｗ,ｓｏｌｖｉｎｇｔｈｒｅｅｄｉｍｅｎｓｉｏｎａｌｃｒａ… 相似文献
10.
PAN Qing yi ZHANG Jian ping 《上海大学学报(英文版)》1999,3(3):255-258
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｉｎｏｒｄｅｒｔｏｄｅｔｅｃｔｔｏｘｉｃｇａｓｌｅａｋａｇｅａｎｄｔｏｐｒｅｖｅｎｔｓｐｏｎｔａｎｅｏｕｓｃｏｍｂｕｓｔｉｏｎａｎｄｅｘｐｌｏｓｉｏｎｏｆｃｏｍｂｕｓｔｉｂｌｅｇａｓｅｓａｎｄｏｒｇａｎｉｃｒｅａｇｅｎｔ,ｖａｒｉｏｕｓｓｏｒｔｓｏｆｇａｓｓｅｎｓｏｒｓｈａｖｅｂｅｅｎｄｅｖｅｌｏｐｅｄ,ｔｈｅｄｅｖｉｃｅｓｔｈａｔｗｅｒｅｓｐｅｃｉａｌｌｙｕｓｅｄｔｏｄｅｔｅｃｔｔｒａｃｅｏｆｔｏｘｉｃｇａｓａｌｓｏｈａｖｅｂｅｅｎｒｅｓｅａｒｃｈｅｄ．Ｔｈｅｂ… 相似文献
11.
In this paper, the conditions of modified melaminc-fotmaldchyde resin (MF) used for a flocculent such as the ratio of reactant,
reaction time, reaction temperature and the value of pi I, were studied. The preferable synthetic conditions were melamine:formaldehyde:
acrylamide (mole)=1:5:(2∼3), reaction temperature 70°C, reaction time 4 h, pH9.0.
Supported by the Science Foundation of Shanghai Municipal Commission of Education (97A26) 相似文献
12.
Study on oxidizing cellulose to 2.3-dialdehyde cellulose by sodium periodate （NalO4） was carried out. The effects of reaction conditions such as pH of solution, temperature, oxidant concentration, oxidation time. the particle size of 2,3-dialdehyde cellulose and alkali treatment temperature on the dialdehyde concentration ot cellulose were investigated in detail, The results show that the aldehyde group content was created while reaction temperature and alkali treatment temperature increased. The most principal factors affecting the aldehyde group content of 2,3-dialdehyde cellulose were found out and the best oxidation conditions were as follows： the pH was 2. the reaction temperature was 45℃. the mass ratio of cellulose to NalO4 was 1/2, the reaction time was 4 h, the alkali treatment temperature was 70℃ and smaller particle size was 0.80 mm. 相似文献
13.
以皮革下脚料铬革屑经碱法制得的蛋白粉为复合氨基酸来源.对饲料添加剂复合氨基酸铜螯合物的合成工艺条件进行了初步的探讨.主要研究了PH值、温度、时间对螯合反应的影响.确定了合适的螯合反应条件:pH=11.0,温度为60℃,时间为30min.并在该条件下测得反应的最佳质量比为mCuSO4·5H2O:mAA=1:3;配位比为nCu2 :nAA=1:2;产品螯合率达到93%.并用红外光谱法鉴定产物. 相似文献
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采用Fenton法处理弱酸艳红B染色废水。通过单因素实验和正交实验,研究反应温度、初始pH值、H2O2和FeSO4投加量及反应时间对色度和COD去除率的影响。结果表明,各因素对COD去除率的影响从大到小依次为：反应温度〉pH值〉H2O2投加量〉FeSO4投加量。而处理废水的最佳条件为：反应温度50℃、初始pH值为2．5、30％H2O2投加量为5mL／L、FeSO4投加量为500mg／L、反应时间为90min。在此条件下,废水色度去除率为99．0％,COD去除率为74．2％。 相似文献
16.
通过对铁碳微电解工艺中的进水p H值、铁碳比、反应时间、温度及进水COD深度因素进行实验研究,找出最佳铁碳微电解预处理工艺的控制点。实验结果表明,在进水p H值为2,铁碳比为1：2,反应时间为2 h的反应条件下,铁碳微电解法对试验所用废水的处理最为有效,CODCr去除率在64%以上,且不随进水浓度和温度的波动而变化;且出水p H值有明显的提高,为后续工序创造了有利条件。 相似文献
17.
以苯胺为原料,采用碳酸二甲酯（DMC）法合成苯异氰酸酯。对第一步苯氨基甲酸甲酯（MPC）的合成从反应温度、反应时间、催化剂用量及反应物料配比四个方面进行了探讨。确定了较优的反应条件为：反应温度为120℃,反应时间为3h,催化剂用量约为苯胺物质的量的7.8%,n（DMC）∶n（苯胺）的物料配比为8∶1。苯异氰酸酯通过减压蒸馏进行提纯,并对目标化合物进行物理常数,UV,IR的测定,经分析确定为目标化合物。苯异氰酸酯的产率为85.17%。 相似文献
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To investigate the structural features and provide an alternative method for high value-added utilization of coal, Lingwu coal was first extracted with organic solvent at room temperature. Then its extraction residue was oxidized in aqueous sodium hypochlorite(ASHC) under mild conditions. The effects of oxidation conditions, such as temperature, reaction time, the ratio of Lingwu coal extraction residue(LCER, g) to ASHC(m L) and p H value, on the product distributions and compositions were investigated. The results of gas chromatography/mass spectrometry(GC/MS) suggested that 53 kinds of methyl esterified products were detected in total, and benzene carboxylic acids were the main oxidation products, while chloro-substituted benzene carboxylic acids were the main by-products. Higher yield and fewer kinds of organic acids could be obtained at lower p H value, especially for the main objective product, benzene carboxylic acids. 相似文献